[repda916]

Water Temp:

• ... theres two, one for the dash gauge and another for the ECU, thats 400ohms each?,

• ... tested one of them once,

• ... right after start it dropped to 396ohms,

• ... then just started failing down til it steady'd out descending,

• ... Pretty simple really.
  
  

TACH:
Tacho

• ... the ‘black but not always solid black (*sigh-yeah-I-Know*)’ wire on one ignitor plug,

• ... is the tacho output signal, middle wire (memory check that on the diagram),

• ... thats in four (4) cylinder format so any digital four cylinder tacho will work off that,

• ... on that plug with five wires and it is always solid black and noticeably thinner than the others,

• ... from memory it's the middle wire, on the one with five wires,

• ... or .. the black one .. it should be pretty obvious,

• ... look at the plug with five wires which one traces off too the dash plugs,

• ... or is a lone wire, all the others do something else,

* +12V wired to pin (BATT)
* (M-REL) drives the Main EFI Relay.
* (+B) and (+B1) both get 12volts when the Main EFI Relay is switched.
* Main EFI Relay appears to be working fine.
* (E11) is grounded.
* (E2) is grounded.
* (E02) is grounded.
* (E01) is grounded.
* (STA) gets a 12volt input from starter relay when the engine is cranking.
* (IGSW) gets a switched 12volts from the ignition switch.